assiduous

adj

Etymology: A learned borrowing from Latin assiduus, from assidere (“to sit down to”), from ad- (“to”) + sedere (“to sit”). Compare sedulous. Cognate (via assidere) to assess.

1. Hard-working, diligent or regular (in attendance or work); industrious.

   “He was officious in the right time and place, quiet as a lamb when his patron seemed inclined to study or to muse, active and assiduous to assist or divert him whenever it seemed to be wished.”

   “He died after three weeks' illness, during which Mrs. Penniman, as well as his daughter, had been assiduous at his bedside.”